===================================================================
@@ -7,6 +7,7 @@
* Copyright (C) 1998 David S. Miller (davem@redhat.com)
*
* Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2007-2010 Bartlomiej Zolnierkiewicz
* Copyright (C) 2007,2009 MontaVista Software, Inc. <source@mvista.com>
*/
@@ -50,72 +51,45 @@
#define UDIDETCR1 0x7B
#define DTPR1 0x7C
-static u8 quantize_timing(int timing, int quant)
-{
- return (timing + quant - 1) / quant;
-}
-
-/*
- * This routine calculates active/recovery counts and then writes them into
- * the chipset registers.
- */
-static void program_cycle_times (ide_drive_t *drive, int cycle_time, int active_time)
+static void cmd64x_program_timings(ide_drive_t *drive, u8 mode)
{
+ ide_hwif_t *hwif = drive->hwif;
struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
- int clock_time = 1000 / (ide_pci_clk ? ide_pci_clk : 33);
- u8 cycle_count, active_count, recovery_count, drwtim;
+ int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
+ const unsigned long T = 1000000 / bus_speed;
static const u8 recovery_values[] =
{15, 15, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 0};
+ static const u8 setup_values[] = {0x40, 0x40, 0x40, 0x80, 0, 0xc0};
+ static const u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23};
static const u8 drwtim_regs[4] = {DRWTIM0, DRWTIM1, DRWTIM2, DRWTIM3};
+ struct ide_timing t;
+ u8 arttim = 0;
- cycle_count = quantize_timing( cycle_time, clock_time);
- active_count = quantize_timing(active_time, clock_time);
- recovery_count = cycle_count - active_count;
+ ide_timing_compute(drive, mode, &t, T, 0);
/*
* In case we've got too long recovery phase, try to lengthen
* the active phase
*/
- if (recovery_count > 16) {
- active_count += recovery_count - 16;
- recovery_count = 16;
+ if (t.recover > 16) {
+ t.active += t.recover - 16;
+ t.recover = 16;
}
- if (active_count > 16) /* shouldn't actually happen... */
- active_count = 16;
+ if (t.active > 16) /* shouldn't actually happen... */
+ t.active = 16;
/*
* Convert values to internal chipset representation
*/
- recovery_count = recovery_values[recovery_count];
- active_count &= 0x0f;
+ t.recover = recovery_values[t.recover];
+ t.active &= 0x0f;
/* Program the active/recovery counts into the DRWTIM register */
- drwtim = (active_count << 4) | recovery_count;
- (void) pci_write_config_byte(dev, drwtim_regs[drive->dn], drwtim);
-}
+ pci_write_config_byte(dev, drwtim_regs[drive->dn],
+ (t.active << 4) | t.recover);
-/*
- * This routine writes into the chipset registers
- * PIO setup/active/recovery timings.
- */
-static void cmd64x_tune_pio(ide_drive_t *drive, const u8 pio)
-{
- ide_hwif_t *hwif = drive->hwif;
- struct pci_dev *dev = to_pci_dev(hwif->dev);
- struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
- unsigned long setup_count;
- unsigned int cycle_time;
- u8 arttim = 0;
-
- static const u8 setup_values[] = {0x40, 0x40, 0x40, 0x80, 0, 0xc0};
- static const u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23};
-
- cycle_time = ide_pio_cycle_time(drive, pio);
-
- program_cycle_times(drive, cycle_time, t->active);
-
- setup_count = quantize_timing(t->setup,
- 1000 / (ide_pci_clk ? ide_pci_clk : 33));
+ if (mode >= XFER_SW_DMA_0)
+ return;
/*
* The primary channel has individual address setup timing registers
@@ -126,15 +100,15 @@ static void cmd64x_tune_pio(ide_drive_t
if (hwif->channel) {
ide_drive_t *pair = ide_get_pair_dev(drive);
- ide_set_drivedata(drive, (void *)setup_count);
+ ide_set_drivedata(drive, (void *)(unsigned long)t.setup);
if (pair)
- setup_count = max_t(u8, setup_count,
+ t.setup = max_t(u8, t.setup,
(unsigned long)ide_get_drivedata(pair));
}
- if (setup_count > 5) /* shouldn't actually happen... */
- setup_count = 5;
+ if (t.setup > 5) /* shouldn't actually happen... */
+ t.setup = 5;
/*
* Program the address setup clocks into the ARTTIM registers.
@@ -144,7 +118,7 @@ static void cmd64x_tune_pio(ide_drive_t
if (hwif->channel)
arttim &= ~ARTTIM23_INTR_CH1;
arttim &= ~0xc0;
- arttim |= setup_values[setup_count];
+ arttim |= setup_values[t.setup];
(void) pci_write_config_byte(dev, arttim_regs[drive->dn], arttim);
}
@@ -162,7 +136,7 @@ static void cmd64x_set_pio_mode(ide_driv
if (pio == 8 || pio == 9)
return;
- cmd64x_tune_pio(drive, pio);
+ cmd64x_program_timings(drive, XFER_PIO_0 + pio);
}
static void cmd64x_set_dma_mode(ide_drive_t *drive, const u8 speed)
@@ -197,13 +171,9 @@ static void cmd64x_set_dma_mode(ide_driv
regU |= unit ? 0xC2 : 0x31;
break;
case XFER_MW_DMA_2:
- program_cycle_times(drive, 120, 70);
- break;
case XFER_MW_DMA_1:
- program_cycle_times(drive, 150, 80);
- break;
case XFER_MW_DMA_0:
- program_cycle_times(drive, 480, 215);
+ cmd64x_program_timings(drive, speed);
break;
}
@@ -471,6 +441,6 @@ static void __exit cmd64x_ide_exit(void)
module_init(cmd64x_ide_init);
module_exit(cmd64x_ide_exit);
-MODULE_AUTHOR("Eddie Dost, David Miller, Andre Hedrick");
+MODULE_AUTHOR("Eddie Dost, David Miller, Andre Hedrick, Bartlomiej Zolnierkiewicz");
MODULE_DESCRIPTION("PCI driver module for CMD64x IDE");
MODULE_LICENSE("GPL");